[PATCH] D109652: [PowerPC] Restrict various P10 options to P10 only.

[Amy Kwan via Phabricator via llvm-commits]

amyk created this revision.
amyk added reviewers: PowerPC, nemanjai, stefanp.
amyk added projects: LLVM, PowerPC.
Herald added subscribers: shchenz, kbarton.
amyk requested review of this revision.
Herald added a project: clang.
Herald added a subscriber: cfe-commits.

This patch attempts to restrict the following P10 <https://reviews.llvm.org/P10> options:

  -mprefixed
  -mpcrel
  -mpaired-vector-memops

To P10 <https://reviews.llvm.org/P10> only. This will prevent the use of these options on P9 <https://reviews.llvm.org/P9> and earlier.

The behaviour of this patch looks like the following on pre-P10:

  $ clang -mcpu=pwr9 -mpaired-vector-memops test.c -o test
  error: option '-mpaired-vector-memops' cannot be specified without '-mcpu=pwr10'
  
  $ clang -mcpu=pwr9 -mprefixed test.c -o test
  error: option '-mprefixed' cannot be specified without '-mcpu=pwr10'
  
  $ clang -mcpu=pwr9 -mprefixed -mpcrel test.c -o test
  error: option '-mpcrel' cannot be specified without '-mprefixed'
  error: option '-mprefixed' cannot be specified without '-mcpu=pwr10'
  
  $ clang -mcpu=pwr9 -mpcrel test.c -o test
  error: option '-mpcrel' cannot be specified without '-mprefixed'


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D109652

Files:
  clang/lib/Basic/Targets/PPC.cpp
  clang/test/Driver/ppc-p10-features-support-check.c

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